Constants SNMP_VALUE_PLAIN or SNMP_VALUE_LIBRARY
may be combined with SNMP_VALUE_OBJECT
resulting different way of representing contents of value
array element in return value of GET-function. If no
SNMP_VALUE_{PLAIN,LIBRARY} constant is
accompanying SNMP_VALUE_OBJECT,
SNMP_VALUE_LIBRARY is used.
Prior to 5.4.0 SNMP_VALUE_OBJECT effecively meant
SNMP_VALUE_OBJECT|SNMP_VALUE_PLAIN.

The interpretation of object oriented keywords like parent
and self has changed. Previously, calling them using the
double colon syntax would emit an E_STRICT warning because
they were interpreted as static.

The interpretation of object oriented keywords like parent
and self has changed. Previously, calling them using the
double colon syntax would emit an E_STRICT warning because
they were interpreted as static.

If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns FALSE.

If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns FALSE.

If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns -1.

In PHP 5 prior to 5.2.7, requesting a given occurrence of a
given weekday in a month where that weekday was the first day
of the month would incorrectly add one week to the returned
timestamp. This has been corrected in 5.2.7 and later
versions.

The Mersenne Twister implementation in PHP now uses a new seeding
algorithm by Richard Wagner. Identical seeds no longer produce the same
sequence of values they did in previous versions. This behavior is not
expected to change again, but it is considered unsafe to rely upon it
nonetheless.

The valid range of a timestamp is typically from Fri, 13 Dec
1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT. (These are
the dates that correspond to the minimum and maximum values for
a 32-bit signed integer). However, before PHP 5.1.0 this range was limited
from 01-01-1970 to 19-01-2038 on some systems (e.g. Windows).